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Histopathology. 2000 Feb;36(2):168-77.

Loss of expression of transforming growth factor beta type II receptor correlates with high tumour grade in human breast in-situ and invasive carcinomas.

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1
Department of Pathology, Vanderbilt University Medical Center, Nashville, TN 37232-2561, USA.

Abstract

AIMS:

Loss of transforming growth factor beta type II receptor (TGFbeta-RII) expression has been associated with resistance to TGFbeta-mediated inhibition of cell proliferation and tumour progression. We investigated whether the expression of TGFbeta-RII is related to the progression of human breast cancer and whether there is a correlation between TGFbeta-RII expression and phenotypic markers of biological aggressiveness.

METHODS AND RESULTS:

Immunohistochemical methods were used to detect TGFbeta-RII in archival breast samples including benign proliferative lesions, ductal carcinoma in situ (DCIS) and invasive mammary carcinomas (IMC). Neoplastic cells showed reduced expression of TGFbeta-RII in comparison to the normal breast tissue and benign lesions. There was a significant inverse correlation between loss of TGFbeta-RII expression and tumour grade within both DCIS (P = 0.004) and IMC (P = 0.001) groups. There was an inverse correlation between TGFbeta-RII expression and both mitotic count (P = 0.001) and clinical stage (P = 0.004). Oestrogen receptor (P = 0.07) and lymph node status (P = 0.10) were not significantly associated with TGFbeta-RII expression.

CONCLUSIONS:

These data indicate that decreased expression of TGFbeta-RII may contribute to breast cancer progression and is related to a more aggressive phenotype in both in-situ and invasive carcinomas.

PMID:
10672063
[Indexed for MEDLINE]
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